He allegedly walked into the HSBC branch on East 55th Street and Madison Avenue at 2:45 p.m. March 29, passed a teller a demand note and ran off with an undisclosed amount of cash.

* A gang of five escaped with three bags worth a total of $6,200 from a SoHo designer boutique, cops said.

One man entered the Louis Vuitton shop on Greene Street at about 3:50 p.m. Saturday and caused a distraction long enough for a second man to grab the bags as the rest of the gang blocked off a security guard, police sources said.

The guard next tried to lock the store’s door, but the thieves broke it and fled north on Greene, authorities said.

Brooklyn

* A mugger knocked an iPhone 4 from its owner’s hand, quickly scooped it up from a Williamsburg sidewalk and ran off with it, police sources said.

The 28-year-old victim, who had been walking on South Third Street near Driggs Avenue at about 1:15 a.m. Sunday, suffered a cut finger, the sources said.

* A teenage would-be phone thief wound up in handcuffs, cops said.

Damien Rivera, 19, allegedly preyed on a 30-year-old man shopping for groceries on Eighth Avenue and 39th Street in Sunset Park, shoved him, grabbed his cell and took off at 7:55 p.m. March 27.

Rivera was soon arrested and charged with grand larceny, robbery, menacing and harassment.

* Police are looking for a burglar who hit a veritable high-tech jackpot in a Williamsburg apartment early yesterday.

The crook climbed the fire escape and gained entry through a rear bedroom window in a building near Bedford Avenue at about 4 a.m., police sources said.

He made off with an Apple MacBook Air notebook computer, an iPad, a Bluetooth stereo, a diamond watch and a Turkish passport, the sources said.

* The gun-toting thief captured in a surveillance photo joined an accomplice in robbing a Flatbush clothing store at about 8:50 p.m. March 28, cops said.

The armed man demanded money from the owner of Hood Wear Cap City, on Flatbush Avenue near Albemarle Road, while his buddy looted the register, authorities said.

They also stole a wallet from a customer, the cops added.

The Bronx

* A man was arrested after breaking into his girlfriend’s Jerome Park apartment and attacking her in the shower, authorities said.

The woman had kicked Felix Henriquez, 24, out of her Valentine Avenue apartment, but he returned at about 6:25 a.m. Saturday, according to a Criminal Court complaint.

He allegedly choked her, dragged her by the neck and hair to her bedroom, threw her to the floor and smashed her laptop, authorities added.

Henriquez was released Sunday after posting $7,500 bail, according to a court database.

Queens

* A man is believed to be responsible for four heists in and around Jamaica and Queens Village, cops said.

He allegedly smacked a 32-year-old worker in the face with a shotgun in a deli on Colfax Street near Murdock Avenue at about 1:40 p.m. March 9 and fled with cash, cops said.

The same man allegedly pulled a similar holdup at a bodega on Hollis Avenue near 205th Street at about 7:45 p.m. March 11, police said.

He hit another deli, on Hollis Avenue and Francis Lewis Boulevard, at 1:55 a.m. March 13, cops said.

And he attacked a 32-year-old worker at a dry cleaners at 5:45 a.m. Tuesday before fleeing emptyhanded, the cops added.

Each of the victims was treated for minor injuries at a local hospital and released, according to investigators.